South East Hampshire will be a unitary authority area scheduled to be created in Hampshire, England, as part of ongoing local government reform. It will be formed by a merger of the existing unitary authority of Portsmouth with the two-tier districts of Fareham, Havant, Gosport, as well as parts of the East Hampshire and Winchester districts. The first councillors will be elected in the 2027 South East Hampshire Council election in May 2027, and the new authority will assume full powers in April 2028.